
XRT94L43
238
REV. 1.0.2
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
C20
STS3RxD_Alarm_0
RxDS3FP_0
TxSTS1FP_0
O
CMOS
STS-3/STM-1 Receive (Drop) Telecom Bus - Alarm Indica-
tor Output signal - Channel 0; DS3/E3 Frame Synchronizer
Framing Pulse Output Pin - Channel 0:
The function of this output pin depends upon whether or not
theSTS-3/STM-1 Telecom Bus Interface for Channel 0 has
been enabled.
If STS-3/STM-1 Telecom Bus (Channel 0) has been enabled
- STS-3/STM-1 Receive Telecom Bus - Alarm Indicator Out-
put signal:
This output pin pulses "High", coincident with any STS-1 signal
(that is being output via the STS3RXD_D_0[7:0] output pins)
that is carrying an AIS-P indicator.
This output pin is "Low" for all other conditions.
If STS-3/STM-1 Telecom Bus (Channel 0) is disabled -
RxDS3FP_0 (Receive DS3 Frame Pulse Input/Output -
Channel 0):
If the STS-3/STM-1 Telecom Bus (Channel 0) is disabled and if
the DS3/E3 Framer block is enabled then this pin will function
as the Receiving Framing Reference output pin. In this mode,
the Frame Synchronizer block (associated with Channel 0) will
pulse this output pin "High" for one DS3/E3 bit-period, coinci-
dent with the first bit (within a given DS3 or E3 frame) being
output via the DS3/E3/STS1_Data_OUT_0 output pin.
NOTE: This pin is inactive if the Frame Synchronizer block,
associated with Channel 0 is by-passed.
E25
STS3RxD_Alarm_1
RxDS3FP_1
TxSTS1FP_1
O
CMOS
STS-3/STM-1 Receive (Drop) Telecom Bus - Alarm Indica-
tor Output signal - Channel 1; DS3/E3 Frame Synchronizer
Framing Pulse Output Pin - Channel 1:
The function of this output pin depends upon whether or not
theSTS-3/STM-1 Telecom Bus Interface for Channel 1 has
been enabled.
If STS-3/STM-1 Telecom Bus (Channel 1) has been enabled
- STS-3/STM-1 Receive Telecom Bus - Alarm Indicator Out-
put signal:
This output pin pulses "High", coincident with any STS-1 signal
(that is being output via the STS3RXD_D_1[7:0] output pins)
that is carrying an AIS-P indicator.
This output pin is "Low" for all other conditions.
If STS-3/STM-1 Telecom Bus (Channel 1) is disabled -
RxDS3FP_1 (Receive DS3 Frame Pulse Input/Output -
Channel 1):
If the STS-3/STM-1 Telecom Bus (Channel 1) is disabled and if
the DS3/E3 Framer block is enabled then this pin will function
as the Receiving Framing Reference output pin. In this mode,
the Frame Synchronizer block (associated with Channel 1) will
pulse this output pin "High" for one DS3/E3 bit-period, coinci-
dent with the first bit (within a given DS3 or E3 frame) being
output via the DS3/E3/STS1_Data_OUT_1 output pin.
NOTE: This pin is inactive if the Frame Synchronizer block,
associated with Channel 1 is by-passed.
STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
PIN #SIGNAL NAME
I/O
SIGNAL
TYPE
DESCRIPTION